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e99ee55abc
* include/ruby/intern.h: constify `argv` parameters. * include/ruby/ruby.h: ditto. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46459 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2639 lines
60 KiB
C
2639 lines
60 KiB
C
/**********************************************************************
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variable.c -
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$Author$
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created at: Tue Apr 19 23:55:15 JST 1994
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Copyright (C) 1993-2007 Yukihiro Matsumoto
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Copyright (C) 2000 Network Applied Communication Laboratory, Inc.
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Copyright (C) 2000 Information-technology Promotion Agency, Japan
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**********************************************************************/
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#include "ruby/ruby.h"
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#include "ruby/st.h"
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#include "ruby/util.h"
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#include "ruby/encoding.h"
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#include "node.h"
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#include "constant.h"
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#include "internal.h"
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#include "id.h"
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st_table *rb_global_tbl;
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static ID autoload, classpath, tmp_classpath, classid;
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void
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Init_var_tables(void)
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{
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rb_global_tbl = st_init_numtable();
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CONST_ID(autoload, "__autoload__");
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/* __classpath__: fully qualified class path */
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CONST_ID(classpath, "__classpath__");
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/* __tmp_classpath__: temporary class path which contains anonymous names */
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CONST_ID(tmp_classpath, "__tmp_classpath__");
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/* __classid__: name given to class/module under an anonymous namespace */
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CONST_ID(classid, "__classid__");
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}
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struct fc_result {
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ID name, preferred;
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VALUE klass;
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VALUE path;
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VALUE track;
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struct fc_result *prev;
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};
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static VALUE
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fc_path(struct fc_result *fc, ID name)
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{
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VALUE path, tmp;
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path = rb_id2str(name);
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while (fc) {
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st_data_t n;
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if (fc->track == rb_cObject) break;
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if (RCLASS_IV_TBL(fc->track) &&
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st_lookup(RCLASS_IV_TBL(fc->track), (st_data_t)classpath, &n)) {
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tmp = rb_str_dup((VALUE)n);
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rb_str_cat2(tmp, "::");
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rb_str_append(tmp, path);
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path = tmp;
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break;
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}
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tmp = rb_str_dup(rb_id2str(fc->name));
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rb_str_cat2(tmp, "::");
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rb_str_append(tmp, path);
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path = tmp;
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fc = fc->prev;
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}
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OBJ_FREEZE(path);
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return path;
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}
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static int
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fc_i(st_data_t k, st_data_t v, st_data_t a)
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{
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ID key = (ID)k;
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rb_const_entry_t *ce = (rb_const_entry_t *)v;
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struct fc_result *res = (struct fc_result *)a;
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VALUE value = ce->value;
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if (!rb_is_const_id(key)) return ST_CONTINUE;
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if (value == res->klass && (!res->preferred || key == res->preferred)) {
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res->path = fc_path(res, key);
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return ST_STOP;
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}
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if (RB_TYPE_P(value, T_MODULE) || RB_TYPE_P(value, T_CLASS)) {
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if (!RCLASS_CONST_TBL(value)) return ST_CONTINUE;
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else {
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struct fc_result arg;
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struct fc_result *list;
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list = res;
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while (list) {
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if (list->track == value) return ST_CONTINUE;
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list = list->prev;
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}
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arg.name = key;
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arg.preferred = res->preferred;
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arg.path = 0;
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arg.klass = res->klass;
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arg.track = value;
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arg.prev = res;
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st_foreach(RCLASS_CONST_TBL(value), fc_i, (st_data_t)&arg);
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if (arg.path) {
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res->path = arg.path;
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return ST_STOP;
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}
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}
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}
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return ST_CONTINUE;
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}
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/**
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* Traverse constant namespace and find +classpath+ for _klass_. If
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* _preferred_ is not 0, choice the path whose base name is set to it.
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* If +classpath+ is found, the hidden instance variable __classpath__
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* is set to the found path, and __tmp_classpath__ is removed.
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* The path is frozen.
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*/
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static VALUE
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find_class_path(VALUE klass, ID preferred)
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{
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struct fc_result arg;
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arg.preferred = preferred;
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arg.name = 0;
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arg.path = 0;
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arg.klass = klass;
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arg.track = rb_cObject;
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arg.prev = 0;
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if (RCLASS_CONST_TBL(rb_cObject)) {
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st_foreach_safe(RCLASS_CONST_TBL(rb_cObject), fc_i, (st_data_t)&arg);
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}
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if (arg.path) {
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st_data_t tmp = tmp_classpath;
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if (!RCLASS_IV_TBL(klass)) {
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RCLASS_IV_TBL(klass) = st_init_numtable();
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}
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rb_st_insert_id_and_value(klass, RCLASS_IV_TBL(klass), (st_data_t)classpath, arg.path);
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st_delete(RCLASS_IV_TBL(klass), &tmp, 0);
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return arg.path;
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}
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return Qnil;
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}
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/**
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* Returns +classpath+ of _klass_, if it is named, or +nil+ for
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* anonymous +class+/+module+. The last part of named +classpath+ is
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* never anonymous, but anonymous +class+/+module+ names may be
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* contained. If the path is "permanent", that means it has no
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* anonymous names, <code>*permanent</code> is set to 1.
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*/
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static VALUE
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classname(VALUE klass, int *permanent)
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{
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VALUE path = Qnil;
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st_data_t n;
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if (!klass) klass = rb_cObject;
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*permanent = 1;
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if (RCLASS_IV_TBL(klass)) {
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if (!st_lookup(RCLASS_IV_TBL(klass), (st_data_t)classpath, &n)) {
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ID cid = 0;
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if (st_lookup(RCLASS_IV_TBL(klass), (st_data_t)classid, &n)) {
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cid = SYM2ID(n);
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path = find_class_path(klass, cid);
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}
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if (NIL_P(path)) {
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path = find_class_path(klass, (ID)0);
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}
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if (NIL_P(path)) {
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if (!cid) {
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return Qnil;
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}
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if (!st_lookup(RCLASS_IV_TBL(klass), (st_data_t)tmp_classpath, &n)) {
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path = rb_id2str(cid);
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return path;
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}
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*permanent = 0;
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path = (VALUE)n;
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return path;
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}
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}
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else {
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path = (VALUE)n;
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}
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if (!RB_TYPE_P(path, T_STRING)) {
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rb_bug("class path is not set properly");
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}
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return path;
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}
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return find_class_path(klass, (ID)0);
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}
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/*
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* call-seq:
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* mod.name -> string
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*
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* Returns the name of the module <i>mod</i>. Returns nil for anonymous modules.
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*/
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VALUE
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rb_mod_name(VALUE mod)
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{
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int permanent;
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VALUE path = classname(mod, &permanent);
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if (!NIL_P(path)) return rb_str_dup(path);
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return path;
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}
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typedef VALUE (*path_cache_func)(VALUE obj, ID id, VALUE val);
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static VALUE
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rb_tmp_class_path(VALUE klass, int *permanent, path_cache_func cache_path)
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{
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VALUE path = classname(klass, permanent);
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st_data_t n = (st_data_t)path;
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if (!NIL_P(path)) {
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return path;
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}
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if (RCLASS_IV_TBL(klass) && st_lookup(RCLASS_IV_TBL(klass),
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(st_data_t)tmp_classpath, &n)) {
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*permanent = 0;
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return (VALUE)n;
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}
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else {
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const char *s = "Class";
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if (RB_TYPE_P(klass, T_MODULE)) {
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if (rb_obj_class(klass) == rb_cModule) {
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s = "Module";
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}
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else {
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int perm;
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VALUE path;
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path = rb_tmp_class_path(RBASIC(klass)->klass, &perm, cache_path);
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s = RSTRING_PTR(path);
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}
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}
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path = rb_sprintf("#<%s:%p>", s, (void*)klass);
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OBJ_FREEZE(path);
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cache_path(klass, tmp_classpath, path);
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*permanent = 0;
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return path;
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}
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}
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VALUE
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rb_class_path(VALUE klass)
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{
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int permanent;
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VALUE path = rb_tmp_class_path(klass, &permanent, rb_ivar_set);
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if (!NIL_P(path)) path = rb_str_dup(path);
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return path;
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}
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static VALUE
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null_cache(VALUE obj, ID id, VALUE val)
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{
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return Qnil;
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}
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VALUE
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rb_class_path_no_cache(VALUE klass)
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{
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int permanent;
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VALUE path = rb_tmp_class_path(klass, &permanent, null_cache);
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if (!NIL_P(path)) path = rb_str_dup(path);
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return path;
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}
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VALUE
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rb_class_path_cached(VALUE klass)
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{
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st_table *ivtbl = RCLASS_IV_TBL(klass);
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st_data_t n;
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if (!ivtbl) return Qnil;
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if (st_lookup(ivtbl, (st_data_t)classpath, &n)) return (VALUE)n;
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if (st_lookup(ivtbl, (st_data_t)tmp_classpath, &n)) return (VALUE)n;
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return Qnil;
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}
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void
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rb_set_class_path_string(VALUE klass, VALUE under, VALUE name)
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{
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VALUE str;
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ID pathid = classpath;
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if (under == rb_cObject) {
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str = rb_str_new_frozen(name);
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}
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else {
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int permanent;
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str = rb_str_dup(rb_tmp_class_path(under, &permanent, rb_ivar_set));
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rb_str_cat2(str, "::");
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rb_str_append(str, name);
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OBJ_FREEZE(str);
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if (!permanent) {
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pathid = tmp_classpath;
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rb_ivar_set(klass, classid, ID2SYM(rb_intern_str(name)));
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}
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}
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rb_ivar_set(klass, pathid, str);
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}
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void
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rb_set_class_path(VALUE klass, VALUE under, const char *name)
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{
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VALUE str;
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ID pathid = classpath;
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if (under == rb_cObject) {
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str = rb_str_new2(name);
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}
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else {
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int permanent;
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str = rb_str_dup(rb_tmp_class_path(under, &permanent, rb_ivar_set));
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rb_str_cat2(str, "::");
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rb_str_cat2(str, name);
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if (!permanent) {
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pathid = tmp_classpath;
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rb_ivar_set(klass, classid, ID2SYM(rb_intern(name)));
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}
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}
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OBJ_FREEZE(str);
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rb_ivar_set(klass, pathid, str);
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}
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VALUE
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rb_path_to_class(VALUE pathname)
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{
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rb_encoding *enc = rb_enc_get(pathname);
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const char *pbeg, *p, *path = RSTRING_PTR(pathname);
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ID id;
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VALUE c = rb_cObject;
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if (!rb_enc_asciicompat(enc)) {
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rb_raise(rb_eArgError, "invalid class path encoding (non ASCII)");
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}
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pbeg = p = path;
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if (path[0] == '#') {
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rb_raise(rb_eArgError, "can't retrieve anonymous class %"PRIsVALUE,
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QUOTE(pathname));
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}
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while (*p) {
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while (*p && *p != ':') p++;
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id = rb_check_id_cstr_without_pindown(pbeg, p-pbeg, enc);
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if (p[0] == ':') {
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if (p[1] != ':') goto undefined_class;
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p += 2;
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pbeg = p;
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}
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if (!id || !rb_const_defined_at(c, id)) {
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undefined_class:
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rb_raise(rb_eArgError, "undefined class/module %.*"PRIsVALUE,
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(int)(p-path), pathname);
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}
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c = rb_const_get_at(c, id);
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if (!RB_TYPE_P(c, T_MODULE) && !RB_TYPE_P(c, T_CLASS)) {
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rb_raise(rb_eTypeError, "%"PRIsVALUE" does not refer to class/module",
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pathname);
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}
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}
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RB_GC_GUARD(pathname);
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return c;
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}
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VALUE
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rb_path2class(const char *path)
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{
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return rb_path_to_class(rb_str_new_cstr(path));
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}
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void
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rb_name_class(VALUE klass, ID id)
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{
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rb_ivar_set(klass, classid, ID2SYM(id));
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}
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VALUE
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rb_class_name(VALUE klass)
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{
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return rb_class_path(rb_class_real(klass));
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}
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const char *
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rb_class2name(VALUE klass)
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{
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int permanent;
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VALUE path = rb_tmp_class_path(rb_class_real(klass), &permanent, rb_ivar_set);
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if (NIL_P(path)) return NULL;
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return RSTRING_PTR(path);
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}
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const char *
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rb_obj_classname(VALUE obj)
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{
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return rb_class2name(CLASS_OF(obj));
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}
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#define global_variable rb_global_variable
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#define global_entry rb_global_entry
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#define gvar_getter_t rb_gvar_getter_t
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#define gvar_setter_t rb_gvar_setter_t
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#define gvar_marker_t rb_gvar_marker_t
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struct trace_var {
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int removed;
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void (*func)(VALUE arg, VALUE val);
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VALUE data;
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struct trace_var *next;
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};
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struct global_variable {
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int counter;
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int block_trace;
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void *data;
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gvar_getter_t *getter;
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gvar_setter_t *setter;
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gvar_marker_t *marker;
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struct trace_var *trace;
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};
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#define undef_getter rb_gvar_undef_getter
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#define undef_setter rb_gvar_undef_setter
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#define undef_marker rb_gvar_undef_marker
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#define val_getter rb_gvar_val_getter
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#define val_setter rb_gvar_val_setter
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#define val_marker rb_gvar_val_marker
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#define var_getter rb_gvar_var_getter
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#define var_setter rb_gvar_var_setter
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#define var_marker rb_gvar_var_marker
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#define readonly_setter rb_gvar_readonly_setter
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struct global_entry*
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rb_global_entry(ID id)
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{
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struct global_entry *entry;
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st_data_t data;
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if (!st_lookup(rb_global_tbl, (st_data_t)id, &data)) {
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struct global_variable *var;
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entry = ALLOC(struct global_entry);
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var = ALLOC(struct global_variable);
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entry->id = id;
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entry->var = var;
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var->counter = 1;
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var->data = 0;
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var->getter = undef_getter;
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var->setter = undef_setter;
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var->marker = undef_marker;
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var->block_trace = 0;
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var->trace = 0;
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st_add_direct(rb_global_tbl, id, (st_data_t)entry);
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}
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else {
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entry = (struct global_entry *)data;
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}
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return entry;
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}
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VALUE
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undef_getter(ID id, void *data, struct global_variable *var)
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{
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rb_warning("global variable `%"PRIsVALUE"' not initialized", QUOTE_ID(id));
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return Qnil;
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}
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|
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void
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undef_setter(VALUE val, ID id, void *data, struct global_variable *var)
|
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{
|
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var->getter = val_getter;
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var->setter = val_setter;
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var->marker = val_marker;
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var->data = (void*)val;
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}
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void
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undef_marker(VALUE *var)
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{
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}
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VALUE
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val_getter(ID id, void *data, struct global_variable *var)
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{
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return (VALUE)data;
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}
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void
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val_setter(VALUE val, ID id, void *data, struct global_variable *var)
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{
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var->data = (void*)val;
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}
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void
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val_marker(VALUE *var)
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{
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VALUE data = (VALUE)var;
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if (data) rb_gc_mark_maybe(data);
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}
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VALUE
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var_getter(ID id, void *data, struct global_variable *gvar)
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{
|
|
VALUE *var = data;
|
|
if (!var) return Qnil;
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return *var;
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}
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|
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void
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var_setter(VALUE val, ID id, void *data, struct global_variable *gvar)
|
|
{
|
|
*(VALUE *)data = val;
|
|
}
|
|
|
|
void
|
|
var_marker(VALUE *var)
|
|
{
|
|
if (var) rb_gc_mark_maybe(*var);
|
|
}
|
|
|
|
void
|
|
readonly_setter(VALUE val, ID id, void *data, struct global_variable *gvar)
|
|
{
|
|
rb_name_error(id, "%"PRIsVALUE" is a read-only variable", QUOTE_ID(id));
|
|
}
|
|
|
|
static int
|
|
mark_global_entry(st_data_t k, st_data_t v, st_data_t a)
|
|
{
|
|
struct global_entry *entry = (struct global_entry *)v;
|
|
struct trace_var *trace;
|
|
struct global_variable *var = entry->var;
|
|
|
|
(*var->marker)(var->data);
|
|
trace = var->trace;
|
|
while (trace) {
|
|
if (trace->data) rb_gc_mark_maybe(trace->data);
|
|
trace = trace->next;
|
|
}
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
void
|
|
rb_gc_mark_global_tbl(void)
|
|
{
|
|
if (rb_global_tbl)
|
|
st_foreach_safe(rb_global_tbl, mark_global_entry, 0);
|
|
}
|
|
|
|
static ID
|
|
global_id(const char *name)
|
|
{
|
|
ID id;
|
|
|
|
if (name[0] == '$') id = rb_intern(name);
|
|
else {
|
|
size_t len = strlen(name);
|
|
char *buf = ALLOCA_N(char, len+1);
|
|
buf[0] = '$';
|
|
memcpy(buf+1, name, len);
|
|
id = rb_intern2(buf, len+1);
|
|
}
|
|
return id;
|
|
}
|
|
|
|
void
|
|
rb_define_hooked_variable(
|
|
const char *name,
|
|
VALUE *var,
|
|
VALUE (*getter)(ANYARGS),
|
|
void (*setter)(ANYARGS))
|
|
{
|
|
volatile VALUE tmp = var ? *var : Qnil;
|
|
ID id = global_id(name);
|
|
struct global_variable *gvar = rb_global_entry(id)->var;
|
|
|
|
gvar->data = (void*)var;
|
|
gvar->getter = getter?(gvar_getter_t *)getter:var_getter;
|
|
gvar->setter = setter?(gvar_setter_t *)setter:var_setter;
|
|
gvar->marker = var_marker;
|
|
|
|
RB_GC_GUARD(tmp);
|
|
}
|
|
|
|
void
|
|
rb_define_variable(const char *name, VALUE *var)
|
|
{
|
|
rb_define_hooked_variable(name, var, 0, 0);
|
|
}
|
|
|
|
void
|
|
rb_define_readonly_variable(const char *name, const VALUE *var)
|
|
{
|
|
rb_define_hooked_variable(name, (VALUE *)var, 0, readonly_setter);
|
|
}
|
|
|
|
void
|
|
rb_define_virtual_variable(
|
|
const char *name,
|
|
VALUE (*getter)(ANYARGS),
|
|
void (*setter)(ANYARGS))
|
|
{
|
|
if (!getter) getter = val_getter;
|
|
if (!setter) setter = readonly_setter;
|
|
rb_define_hooked_variable(name, 0, getter, setter);
|
|
}
|
|
|
|
static void
|
|
rb_trace_eval(VALUE cmd, VALUE val)
|
|
{
|
|
rb_eval_cmd(cmd, rb_ary_new3(1, val), 0);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* trace_var(symbol, cmd ) -> nil
|
|
* trace_var(symbol) {|val| block } -> nil
|
|
*
|
|
* Controls tracing of assignments to global variables. The parameter
|
|
* +symbol+ identifies the variable (as either a string name or a
|
|
* symbol identifier). _cmd_ (which may be a string or a
|
|
* +Proc+ object) or block is executed whenever the variable
|
|
* is assigned. The block or +Proc+ object receives the
|
|
* variable's new value as a parameter. Also see
|
|
* <code>Kernel::untrace_var</code>.
|
|
*
|
|
* trace_var :$_, proc {|v| puts "$_ is now '#{v}'" }
|
|
* $_ = "hello"
|
|
* $_ = ' there'
|
|
*
|
|
* <em>produces:</em>
|
|
*
|
|
* $_ is now 'hello'
|
|
* $_ is now ' there'
|
|
*/
|
|
|
|
VALUE
|
|
rb_f_trace_var(int argc, const VALUE *argv)
|
|
{
|
|
VALUE var, cmd;
|
|
struct global_entry *entry;
|
|
struct trace_var *trace;
|
|
|
|
if (rb_scan_args(argc, argv, "11", &var, &cmd) == 1) {
|
|
cmd = rb_block_proc();
|
|
}
|
|
if (NIL_P(cmd)) {
|
|
return rb_f_untrace_var(argc, argv);
|
|
}
|
|
entry = rb_global_entry(rb_to_id(var));
|
|
if (OBJ_TAINTED(cmd)) {
|
|
rb_raise(rb_eSecurityError, "Insecure: tainted variable trace");
|
|
}
|
|
trace = ALLOC(struct trace_var);
|
|
trace->next = entry->var->trace;
|
|
trace->func = rb_trace_eval;
|
|
trace->data = cmd;
|
|
trace->removed = 0;
|
|
entry->var->trace = trace;
|
|
|
|
return Qnil;
|
|
}
|
|
|
|
static void
|
|
remove_trace(struct global_variable *var)
|
|
{
|
|
struct trace_var *trace = var->trace;
|
|
struct trace_var t;
|
|
struct trace_var *next;
|
|
|
|
t.next = trace;
|
|
trace = &t;
|
|
while (trace->next) {
|
|
next = trace->next;
|
|
if (next->removed) {
|
|
trace->next = next->next;
|
|
xfree(next);
|
|
}
|
|
else {
|
|
trace = next;
|
|
}
|
|
}
|
|
var->trace = t.next;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* untrace_var(symbol [, cmd] ) -> array or nil
|
|
*
|
|
* Removes tracing for the specified command on the given global
|
|
* variable and returns +nil+. If no command is specified,
|
|
* removes all tracing for that variable and returns an array
|
|
* containing the commands actually removed.
|
|
*/
|
|
|
|
VALUE
|
|
rb_f_untrace_var(int argc, const VALUE *argv)
|
|
{
|
|
VALUE var, cmd;
|
|
ID id;
|
|
struct global_entry *entry;
|
|
struct trace_var *trace;
|
|
st_data_t data;
|
|
|
|
rb_scan_args(argc, argv, "11", &var, &cmd);
|
|
id = rb_check_id(&var);
|
|
if (!id) {
|
|
rb_name_error_str(var, "undefined global variable %"PRIsVALUE"", QUOTE(var));
|
|
}
|
|
if (!st_lookup(rb_global_tbl, (st_data_t)id, &data)) {
|
|
rb_name_error(id, "undefined global variable %"PRIsVALUE"", QUOTE_ID(id));
|
|
}
|
|
|
|
trace = (entry = (struct global_entry *)data)->var->trace;
|
|
if (NIL_P(cmd)) {
|
|
VALUE ary = rb_ary_new();
|
|
|
|
while (trace) {
|
|
struct trace_var *next = trace->next;
|
|
rb_ary_push(ary, (VALUE)trace->data);
|
|
trace->removed = 1;
|
|
trace = next;
|
|
}
|
|
|
|
if (!entry->var->block_trace) remove_trace(entry->var);
|
|
return ary;
|
|
}
|
|
else {
|
|
while (trace) {
|
|
if (trace->data == cmd) {
|
|
trace->removed = 1;
|
|
if (!entry->var->block_trace) remove_trace(entry->var);
|
|
return rb_ary_new3(1, cmd);
|
|
}
|
|
trace = trace->next;
|
|
}
|
|
}
|
|
return Qnil;
|
|
}
|
|
|
|
VALUE
|
|
rb_gvar_get(struct global_entry *entry)
|
|
{
|
|
struct global_variable *var = entry->var;
|
|
return (*var->getter)(entry->id, var->data, var);
|
|
}
|
|
|
|
struct trace_data {
|
|
struct trace_var *trace;
|
|
VALUE val;
|
|
};
|
|
|
|
static VALUE
|
|
trace_ev(struct trace_data *data)
|
|
{
|
|
struct trace_var *trace = data->trace;
|
|
|
|
while (trace) {
|
|
(*trace->func)(trace->data, data->val);
|
|
trace = trace->next;
|
|
}
|
|
|
|
return Qnil;
|
|
}
|
|
|
|
static VALUE
|
|
trace_en(struct global_variable *var)
|
|
{
|
|
var->block_trace = 0;
|
|
remove_trace(var);
|
|
return Qnil; /* not reached */
|
|
}
|
|
|
|
VALUE
|
|
rb_gvar_set(struct global_entry *entry, VALUE val)
|
|
{
|
|
struct trace_data trace;
|
|
struct global_variable *var = entry->var;
|
|
|
|
(*var->setter)(val, entry->id, var->data, var);
|
|
|
|
if (var->trace && !var->block_trace) {
|
|
var->block_trace = 1;
|
|
trace.trace = var->trace;
|
|
trace.val = val;
|
|
rb_ensure(trace_ev, (VALUE)&trace, trace_en, (VALUE)var);
|
|
}
|
|
return val;
|
|
}
|
|
|
|
VALUE
|
|
rb_gv_set(const char *name, VALUE val)
|
|
{
|
|
struct global_entry *entry;
|
|
|
|
entry = rb_global_entry(global_id(name));
|
|
return rb_gvar_set(entry, val);
|
|
}
|
|
|
|
VALUE
|
|
rb_gv_get(const char *name)
|
|
{
|
|
struct global_entry *entry;
|
|
|
|
entry = rb_global_entry(global_id(name));
|
|
return rb_gvar_get(entry);
|
|
}
|
|
|
|
VALUE
|
|
rb_gvar_defined(struct global_entry *entry)
|
|
{
|
|
if (entry->var->getter == undef_getter) return Qfalse;
|
|
return Qtrue;
|
|
}
|
|
|
|
static int
|
|
gvar_i(st_data_t k, st_data_t v, st_data_t a)
|
|
{
|
|
ID key = (ID)k;
|
|
VALUE ary = (VALUE)a;
|
|
rb_ary_push(ary, ID2SYM(key));
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* global_variables -> array
|
|
*
|
|
* Returns an array of the names of global variables.
|
|
*
|
|
* global_variables.grep /std/ #=> [:$stdin, :$stdout, :$stderr]
|
|
*/
|
|
|
|
VALUE
|
|
rb_f_global_variables(void)
|
|
{
|
|
VALUE ary = rb_ary_new();
|
|
char buf[2];
|
|
int i;
|
|
|
|
st_foreach_safe(rb_global_tbl, gvar_i, ary);
|
|
buf[0] = '$';
|
|
for (i = 1; i <= 9; ++i) {
|
|
buf[1] = (char)(i + '0');
|
|
rb_ary_push(ary, ID2SYM(rb_intern2(buf, 2)));
|
|
}
|
|
return ary;
|
|
}
|
|
|
|
void
|
|
rb_alias_variable(ID name1, ID name2)
|
|
{
|
|
struct global_entry *entry1, *entry2;
|
|
st_data_t data1;
|
|
|
|
entry2 = rb_global_entry(name2);
|
|
if (!st_lookup(rb_global_tbl, (st_data_t)name1, &data1)) {
|
|
name1 = SYM2ID(ID2SYM(name1));
|
|
entry1 = ALLOC(struct global_entry);
|
|
entry1->id = name1;
|
|
st_add_direct(rb_global_tbl, name1, (st_data_t)entry1);
|
|
}
|
|
else if ((entry1 = (struct global_entry *)data1)->var != entry2->var) {
|
|
struct global_variable *var = entry1->var;
|
|
if (var->block_trace) {
|
|
rb_raise(rb_eRuntimeError, "can't alias in tracer");
|
|
}
|
|
var->counter--;
|
|
if (var->counter == 0) {
|
|
struct trace_var *trace = var->trace;
|
|
while (trace) {
|
|
struct trace_var *next = trace->next;
|
|
xfree(trace);
|
|
trace = next;
|
|
}
|
|
xfree(var);
|
|
}
|
|
}
|
|
else {
|
|
return;
|
|
}
|
|
entry2->var->counter++;
|
|
entry1->var = entry2->var;
|
|
}
|
|
|
|
static int special_generic_ivar = 0;
|
|
static st_table *generic_iv_tbl;
|
|
|
|
st_table*
|
|
rb_generic_ivar_table(VALUE obj)
|
|
{
|
|
st_data_t tbl;
|
|
|
|
if (!FL_TEST(obj, FL_EXIVAR)) return 0;
|
|
if (!generic_iv_tbl) return 0;
|
|
if (!st_lookup(generic_iv_tbl, (st_data_t)obj, &tbl)) return 0;
|
|
return (st_table *)tbl;
|
|
}
|
|
|
|
static VALUE
|
|
generic_ivar_get(VALUE obj, ID id, VALUE undef)
|
|
{
|
|
st_data_t tbl, val;
|
|
|
|
if (generic_iv_tbl) {
|
|
if (st_lookup(generic_iv_tbl, (st_data_t)obj, &tbl)) {
|
|
if (st_lookup((st_table *)tbl, (st_data_t)id, &val)) {
|
|
return (VALUE)val;
|
|
}
|
|
}
|
|
}
|
|
return undef;
|
|
}
|
|
|
|
static void
|
|
generic_ivar_set(VALUE obj, ID id, VALUE val)
|
|
{
|
|
st_table *tbl;
|
|
st_data_t data;
|
|
|
|
if (rb_special_const_p(obj)) {
|
|
if (rb_obj_frozen_p(obj)) rb_error_frozen("object");
|
|
special_generic_ivar = 1;
|
|
}
|
|
if (!generic_iv_tbl) {
|
|
generic_iv_tbl = st_init_numtable();
|
|
}
|
|
if (!st_lookup(generic_iv_tbl, (st_data_t)obj, &data)) {
|
|
FL_SET(obj, FL_EXIVAR);
|
|
tbl = st_init_numtable();
|
|
st_add_direct(generic_iv_tbl, (st_data_t)obj, (st_data_t)tbl);
|
|
st_add_direct(tbl, (st_data_t)id, (st_data_t)val);
|
|
if (FL_ABLE(obj)) RB_OBJ_WRITTEN(obj, Qundef, val);
|
|
return;
|
|
}
|
|
st_insert((st_table *)data, (st_data_t)id, (st_data_t)val);
|
|
if (FL_ABLE(obj)) RB_OBJ_WRITTEN(obj, data, val);
|
|
}
|
|
|
|
static VALUE
|
|
generic_ivar_defined(VALUE obj, ID id)
|
|
{
|
|
st_table *tbl;
|
|
st_data_t data;
|
|
|
|
if (!generic_iv_tbl) return Qfalse;
|
|
if (!st_lookup(generic_iv_tbl, (st_data_t)obj, &data)) return Qfalse;
|
|
tbl = (st_table *)data;
|
|
if (st_lookup(tbl, (st_data_t)id, &data)) {
|
|
return Qtrue;
|
|
}
|
|
return Qfalse;
|
|
}
|
|
|
|
static int
|
|
generic_ivar_remove(VALUE obj, ID id, st_data_t *valp)
|
|
{
|
|
st_table *tbl;
|
|
st_data_t data, key = (st_data_t)id;
|
|
int status;
|
|
|
|
if (!generic_iv_tbl) return 0;
|
|
if (!st_lookup(generic_iv_tbl, (st_data_t)obj, &data)) return 0;
|
|
tbl = (st_table *)data;
|
|
status = st_delete(tbl, &key, valp);
|
|
if (tbl->num_entries == 0) {
|
|
key = (st_data_t)obj;
|
|
st_delete(generic_iv_tbl, &key, &data);
|
|
st_free_table((st_table *)data);
|
|
}
|
|
return status;
|
|
}
|
|
|
|
void
|
|
rb_mark_generic_ivar(VALUE obj)
|
|
{
|
|
st_data_t tbl;
|
|
|
|
if (!generic_iv_tbl) return;
|
|
if (st_lookup(generic_iv_tbl, (st_data_t)obj, &tbl)) {
|
|
rb_mark_tbl((st_table *)tbl);
|
|
}
|
|
}
|
|
|
|
static int
|
|
givar_mark_i(st_data_t k, st_data_t v, st_data_t a)
|
|
{
|
|
VALUE value = (VALUE)v;
|
|
rb_gc_mark(value);
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
static int
|
|
givar_i(st_data_t k, st_data_t v, st_data_t a)
|
|
{
|
|
VALUE obj = (VALUE)k;
|
|
st_table *tbl = (st_table *)v;
|
|
if (rb_special_const_p(obj)) {
|
|
st_foreach_safe(tbl, givar_mark_i, 0);
|
|
}
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
void
|
|
rb_mark_generic_ivar_tbl(void)
|
|
{
|
|
if (!generic_iv_tbl) return;
|
|
if (special_generic_ivar == 0) return;
|
|
st_foreach_safe(generic_iv_tbl, givar_i, 0);
|
|
}
|
|
|
|
void
|
|
rb_free_generic_ivar(VALUE obj)
|
|
{
|
|
st_data_t key = (st_data_t)obj, tbl;
|
|
|
|
if (!generic_iv_tbl) return;
|
|
if (st_delete(generic_iv_tbl, &key, &tbl))
|
|
st_free_table((st_table *)tbl);
|
|
}
|
|
|
|
RUBY_FUNC_EXPORTED size_t
|
|
rb_generic_ivar_memsize(VALUE obj)
|
|
{
|
|
st_data_t tbl;
|
|
if (st_lookup(generic_iv_tbl, (st_data_t)obj, &tbl))
|
|
return st_memsize((st_table *)tbl);
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
rb_copy_generic_ivar(VALUE clone, VALUE obj)
|
|
{
|
|
st_data_t data;
|
|
|
|
if (!generic_iv_tbl) return;
|
|
if (!FL_TEST(obj, FL_EXIVAR)) {
|
|
clear:
|
|
if (FL_TEST(clone, FL_EXIVAR)) {
|
|
rb_free_generic_ivar(clone);
|
|
FL_UNSET(clone, FL_EXIVAR);
|
|
}
|
|
return;
|
|
}
|
|
if (st_lookup(generic_iv_tbl, (st_data_t)obj, &data)) {
|
|
st_table *tbl = (st_table *)data;
|
|
|
|
if (tbl->num_entries == 0)
|
|
goto clear;
|
|
|
|
if (st_lookup(generic_iv_tbl, (st_data_t)clone, &data)) {
|
|
st_free_table((st_table *)data);
|
|
st_insert(generic_iv_tbl, (st_data_t)clone, (st_data_t)st_copy(tbl));
|
|
}
|
|
else {
|
|
st_add_direct(generic_iv_tbl, (st_data_t)clone, (st_data_t)st_copy(tbl));
|
|
FL_SET(clone, FL_EXIVAR);
|
|
}
|
|
}
|
|
}
|
|
|
|
static VALUE
|
|
rb_ivar_lookup(VALUE obj, ID id, VALUE undef)
|
|
{
|
|
VALUE val, *ptr;
|
|
struct st_table *iv_index_tbl;
|
|
long len;
|
|
st_data_t index;
|
|
|
|
if (SPECIAL_CONST_P(obj)) goto generic;
|
|
switch (BUILTIN_TYPE(obj)) {
|
|
case T_OBJECT:
|
|
len = ROBJECT_NUMIV(obj);
|
|
ptr = ROBJECT_IVPTR(obj);
|
|
iv_index_tbl = ROBJECT_IV_INDEX_TBL(obj);
|
|
if (!iv_index_tbl) break;
|
|
if (!st_lookup(iv_index_tbl, (st_data_t)id, &index)) break;
|
|
if (len <= (long)index) break;
|
|
val = ptr[index];
|
|
if (val != Qundef)
|
|
return val;
|
|
break;
|
|
case T_CLASS:
|
|
case T_MODULE:
|
|
if (RCLASS_IV_TBL(obj) && st_lookup(RCLASS_IV_TBL(obj), (st_data_t)id, &index))
|
|
return (VALUE)index;
|
|
break;
|
|
default:
|
|
generic:
|
|
if (FL_TEST(obj, FL_EXIVAR) || rb_special_const_p(obj))
|
|
return generic_ivar_get(obj, id, undef);
|
|
break;
|
|
}
|
|
return undef;
|
|
}
|
|
|
|
VALUE
|
|
rb_ivar_get(VALUE obj, ID id)
|
|
{
|
|
VALUE iv = rb_ivar_lookup(obj, id, Qundef);
|
|
|
|
if (iv == Qundef) {
|
|
rb_warning("instance variable %"PRIsVALUE" not initialized", QUOTE_ID(id));
|
|
iv = Qnil;
|
|
}
|
|
return iv;
|
|
}
|
|
|
|
VALUE
|
|
rb_attr_get(VALUE obj, ID id)
|
|
{
|
|
return rb_ivar_lookup(obj, id, Qnil);
|
|
}
|
|
|
|
VALUE
|
|
rb_ivar_set(VALUE obj, ID id, VALUE val)
|
|
{
|
|
struct st_table *iv_index_tbl;
|
|
st_data_t index;
|
|
long i, len;
|
|
int ivar_extended;
|
|
|
|
rb_check_frozen(obj);
|
|
if (SPECIAL_CONST_P(obj)) goto generic;
|
|
switch (BUILTIN_TYPE(obj)) {
|
|
case T_OBJECT:
|
|
iv_index_tbl = ROBJECT_IV_INDEX_TBL(obj);
|
|
if (!iv_index_tbl) {
|
|
VALUE klass = rb_obj_class(obj);
|
|
iv_index_tbl = RCLASS_IV_INDEX_TBL(klass);
|
|
if (!iv_index_tbl) {
|
|
iv_index_tbl = RCLASS_IV_INDEX_TBL(klass) = st_init_numtable();
|
|
}
|
|
}
|
|
ivar_extended = 0;
|
|
if (!st_lookup(iv_index_tbl, (st_data_t)id, &index)) {
|
|
index = iv_index_tbl->num_entries;
|
|
st_add_direct(iv_index_tbl, (st_data_t)id, index);
|
|
ivar_extended = 1;
|
|
}
|
|
len = ROBJECT_NUMIV(obj);
|
|
if (len <= (long)index) {
|
|
VALUE *ptr = ROBJECT_IVPTR(obj);
|
|
if (index < ROBJECT_EMBED_LEN_MAX) {
|
|
RBASIC(obj)->flags |= ROBJECT_EMBED;
|
|
ptr = ROBJECT(obj)->as.ary;
|
|
for (i = 0; i < ROBJECT_EMBED_LEN_MAX; i++) {
|
|
ptr[i] = Qundef;
|
|
}
|
|
}
|
|
else {
|
|
VALUE *newptr;
|
|
long newsize = (index+1) + (index+1)/4; /* (index+1)*1.25 */
|
|
if (!ivar_extended &&
|
|
iv_index_tbl->num_entries < (st_index_t)newsize) {
|
|
newsize = iv_index_tbl->num_entries;
|
|
}
|
|
if (RBASIC(obj)->flags & ROBJECT_EMBED) {
|
|
newptr = ALLOC_N(VALUE, newsize);
|
|
MEMCPY(newptr, ptr, VALUE, len);
|
|
RBASIC(obj)->flags &= ~ROBJECT_EMBED;
|
|
ROBJECT(obj)->as.heap.ivptr = newptr;
|
|
}
|
|
else {
|
|
REALLOC_N(ROBJECT(obj)->as.heap.ivptr, VALUE, newsize);
|
|
newptr = ROBJECT(obj)->as.heap.ivptr;
|
|
}
|
|
for (; len < newsize; len++)
|
|
newptr[len] = Qundef;
|
|
ROBJECT(obj)->as.heap.numiv = newsize;
|
|
ROBJECT(obj)->as.heap.iv_index_tbl = iv_index_tbl;
|
|
}
|
|
}
|
|
RB_OBJ_WRITE(obj, &ROBJECT_IVPTR(obj)[index], val);
|
|
break;
|
|
case T_CLASS:
|
|
case T_MODULE:
|
|
if (!RCLASS_IV_TBL(obj)) RCLASS_IV_TBL(obj) = st_init_numtable();
|
|
rb_st_insert_id_and_value(obj, RCLASS_IV_TBL(obj), (st_data_t)id, val);
|
|
break;
|
|
default:
|
|
generic:
|
|
generic_ivar_set(obj, id, val);
|
|
break;
|
|
}
|
|
return val;
|
|
}
|
|
|
|
VALUE
|
|
rb_ivar_defined(VALUE obj, ID id)
|
|
{
|
|
VALUE val;
|
|
struct st_table *iv_index_tbl;
|
|
st_data_t index;
|
|
if (SPECIAL_CONST_P(obj)) goto generic;
|
|
switch (BUILTIN_TYPE(obj)) {
|
|
case T_OBJECT:
|
|
iv_index_tbl = ROBJECT_IV_INDEX_TBL(obj);
|
|
if (!iv_index_tbl) break;
|
|
if (!st_lookup(iv_index_tbl, (st_data_t)id, &index)) break;
|
|
if (ROBJECT_NUMIV(obj) <= (long)index) break;
|
|
val = ROBJECT_IVPTR(obj)[index];
|
|
if (val != Qundef)
|
|
return Qtrue;
|
|
break;
|
|
case T_CLASS:
|
|
case T_MODULE:
|
|
if (RCLASS_IV_TBL(obj) && st_lookup(RCLASS_IV_TBL(obj), (st_data_t)id, 0))
|
|
return Qtrue;
|
|
break;
|
|
default:
|
|
generic:
|
|
if (FL_TEST(obj, FL_EXIVAR) || rb_special_const_p(obj))
|
|
return generic_ivar_defined(obj, id);
|
|
break;
|
|
}
|
|
return Qfalse;
|
|
}
|
|
|
|
struct obj_ivar_tag {
|
|
VALUE obj;
|
|
int (*func)(ID key, VALUE val, st_data_t arg);
|
|
st_data_t arg;
|
|
};
|
|
|
|
static int
|
|
obj_ivar_i(st_data_t key, st_data_t index, st_data_t arg)
|
|
{
|
|
struct obj_ivar_tag *data = (struct obj_ivar_tag *)arg;
|
|
if ((long)index < ROBJECT_NUMIV(data->obj)) {
|
|
VALUE val = ROBJECT_IVPTR(data->obj)[(long)index];
|
|
if (val != Qundef) {
|
|
return (data->func)((ID)key, val, data->arg);
|
|
}
|
|
}
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
static void
|
|
obj_ivar_each(VALUE obj, int (*func)(ANYARGS), st_data_t arg)
|
|
{
|
|
st_table *tbl;
|
|
struct obj_ivar_tag data;
|
|
|
|
tbl = ROBJECT_IV_INDEX_TBL(obj);
|
|
if (!tbl)
|
|
return;
|
|
|
|
data.obj = obj;
|
|
data.func = (int (*)(ID key, VALUE val, st_data_t arg))func;
|
|
data.arg = arg;
|
|
|
|
st_foreach_safe(tbl, obj_ivar_i, (st_data_t)&data);
|
|
}
|
|
|
|
void
|
|
rb_ivar_foreach(VALUE obj, int (*func)(ANYARGS), st_data_t arg)
|
|
{
|
|
if (SPECIAL_CONST_P(obj)) goto generic;
|
|
switch (BUILTIN_TYPE(obj)) {
|
|
case T_OBJECT:
|
|
obj_ivar_each(obj, func, arg);
|
|
break;
|
|
case T_CLASS:
|
|
case T_MODULE:
|
|
if (RCLASS_IV_TBL(obj)) {
|
|
st_foreach_safe(RCLASS_IV_TBL(obj), func, arg);
|
|
}
|
|
break;
|
|
default:
|
|
generic:
|
|
if (!generic_iv_tbl) break;
|
|
if (FL_TEST(obj, FL_EXIVAR) || rb_special_const_p(obj)) {
|
|
st_data_t tbl;
|
|
|
|
if (st_lookup(generic_iv_tbl, (st_data_t)obj, &tbl)) {
|
|
st_foreach_safe((st_table *)tbl, func, arg);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
st_index_t
|
|
rb_ivar_count(VALUE obj)
|
|
{
|
|
st_table *tbl;
|
|
if (SPECIAL_CONST_P(obj)) goto generic;
|
|
switch (BUILTIN_TYPE(obj)) {
|
|
case T_OBJECT:
|
|
if ((tbl = ROBJECT_IV_INDEX_TBL(obj)) != 0) {
|
|
st_index_t i, count, num = tbl->num_entries;
|
|
const VALUE *const ivptr = ROBJECT_IVPTR(obj);
|
|
for (i = count = 0; i < num; ++i) {
|
|
if (ivptr[i] != Qundef) {
|
|
count++;
|
|
}
|
|
}
|
|
return count;
|
|
}
|
|
break;
|
|
case T_CLASS:
|
|
case T_MODULE:
|
|
if ((tbl = RCLASS_IV_TBL(obj)) != 0) {
|
|
return tbl->num_entries;
|
|
}
|
|
break;
|
|
default:
|
|
generic:
|
|
if (!generic_iv_tbl) break;
|
|
if (FL_TEST(obj, FL_EXIVAR) || rb_special_const_p(obj)) {
|
|
st_data_t data;
|
|
|
|
if (st_lookup(generic_iv_tbl, (st_data_t)obj, &data) &&
|
|
(tbl = (st_table *)data) != 0) {
|
|
return tbl->num_entries;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
ivar_i(st_data_t k, st_data_t v, st_data_t a)
|
|
{
|
|
ID key = (ID)k;
|
|
VALUE ary = (VALUE)a;
|
|
|
|
if (rb_is_instance_id(key)) {
|
|
rb_ary_push(ary, ID2SYM(key));
|
|
}
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* obj.instance_variables -> array
|
|
*
|
|
* Returns an array of instance variable names for the receiver. Note
|
|
* that simply defining an accessor does not create the corresponding
|
|
* instance variable.
|
|
*
|
|
* class Fred
|
|
* attr_accessor :a1
|
|
* def initialize
|
|
* @iv = 3
|
|
* end
|
|
* end
|
|
* Fred.new.instance_variables #=> [:@iv]
|
|
*/
|
|
|
|
VALUE
|
|
rb_obj_instance_variables(VALUE obj)
|
|
{
|
|
VALUE ary;
|
|
|
|
ary = rb_ary_new();
|
|
rb_ivar_foreach(obj, ivar_i, ary);
|
|
return ary;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* obj.remove_instance_variable(symbol) -> obj
|
|
*
|
|
* Removes the named instance variable from <i>obj</i>, returning that
|
|
* variable's value.
|
|
*
|
|
* class Dummy
|
|
* attr_reader :var
|
|
* def initialize
|
|
* @var = 99
|
|
* end
|
|
* def remove
|
|
* remove_instance_variable(:@var)
|
|
* end
|
|
* end
|
|
* d = Dummy.new
|
|
* d.var #=> 99
|
|
* d.remove #=> 99
|
|
* d.var #=> nil
|
|
*/
|
|
|
|
VALUE
|
|
rb_obj_remove_instance_variable(VALUE obj, VALUE name)
|
|
{
|
|
VALUE val = Qnil;
|
|
const ID id = rb_check_id_without_pindown(&name);
|
|
st_data_t n, v;
|
|
struct st_table *iv_index_tbl;
|
|
st_data_t index;
|
|
|
|
rb_check_frozen(obj);
|
|
if (!id) {
|
|
if (rb_is_instance_name(name)) {
|
|
rb_name_error_str(name, "instance variable %"PRIsVALUE" not defined",
|
|
name);
|
|
}
|
|
else {
|
|
rb_name_error_str(name, "`%"PRIsVALUE"' is not allowed as an instance variable name",
|
|
QUOTE(name));
|
|
}
|
|
}
|
|
if (!rb_is_instance_id(id)) {
|
|
rb_name_error(id, "`%"PRIsVALUE"' is not allowed as an instance variable name",
|
|
QUOTE_ID(id));
|
|
}
|
|
|
|
if (SPECIAL_CONST_P(obj)) goto generic;
|
|
switch (BUILTIN_TYPE(obj)) {
|
|
case T_OBJECT:
|
|
iv_index_tbl = ROBJECT_IV_INDEX_TBL(obj);
|
|
if (!iv_index_tbl) break;
|
|
if (!st_lookup(iv_index_tbl, (st_data_t)id, &index)) break;
|
|
if (ROBJECT_NUMIV(obj) <= (long)index) break;
|
|
val = ROBJECT_IVPTR(obj)[index];
|
|
if (val != Qundef) {
|
|
ROBJECT_IVPTR(obj)[index] = Qundef;
|
|
return val;
|
|
}
|
|
break;
|
|
case T_CLASS:
|
|
case T_MODULE:
|
|
n = id;
|
|
if (RCLASS_IV_TBL(obj) && st_delete(RCLASS_IV_TBL(obj), &n, &v)) {
|
|
return (VALUE)v;
|
|
}
|
|
break;
|
|
default:
|
|
generic:
|
|
if (FL_TEST(obj, FL_EXIVAR) || rb_special_const_p(obj)) {
|
|
v = val;
|
|
if (generic_ivar_remove(obj, (st_data_t)id, &v)) {
|
|
return (VALUE)v;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
rb_name_error(id, "instance variable %"PRIsVALUE" not defined", QUOTE_ID(id));
|
|
|
|
UNREACHABLE;
|
|
}
|
|
|
|
NORETURN(static void uninitialized_constant(VALUE, ID));
|
|
static void
|
|
uninitialized_constant(VALUE klass, ID id)
|
|
{
|
|
if (klass && rb_class_real(klass) != rb_cObject)
|
|
rb_name_error(id, "uninitialized constant %"PRIsVALUE"::%"PRIsVALUE"",
|
|
rb_class_name(klass),
|
|
QUOTE_ID(id));
|
|
else {
|
|
rb_name_error(id, "uninitialized constant %"PRIsVALUE"", QUOTE_ID(id));
|
|
}
|
|
}
|
|
|
|
static VALUE
|
|
const_missing(VALUE klass, ID id)
|
|
{
|
|
return rb_funcall(klass, rb_intern("const_missing"), 1, ID2SYM(id));
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* mod.const_missing(sym) -> obj
|
|
*
|
|
* Invoked when a reference is made to an undefined constant in
|
|
* <i>mod</i>. It is passed a symbol for the undefined constant, and
|
|
* returns a value to be used for that constant. The
|
|
* following code is an example of the same:
|
|
*
|
|
* def Foo.const_missing(name)
|
|
* name # return the constant name as Symbol
|
|
* end
|
|
*
|
|
* Foo::UNDEFINED_CONST #=> :UNDEFINED_CONST: symbol returned
|
|
*
|
|
* In the next example when a reference is made to an undefined constant,
|
|
* it attempts to load a file whose name is the lowercase version of the
|
|
* constant (thus class <code>Fred</code> is assumed to be in file
|
|
* <code>fred.rb</code>). If found, it returns the loaded class. It
|
|
* therefore implements an autoload feature similar to Kernel#autoload and
|
|
* Module#autoload.
|
|
*
|
|
* def Object.const_missing(name)
|
|
* @looked_for ||= {}
|
|
* str_name = name.to_s
|
|
* raise "Class not found: #{name}" if @looked_for[str_name]
|
|
* @looked_for[str_name] = 1
|
|
* file = str_name.downcase
|
|
* require file
|
|
* klass = const_get(name)
|
|
* return klass if klass
|
|
* raise "Class not found: #{name}"
|
|
* end
|
|
*
|
|
*/
|
|
|
|
VALUE
|
|
rb_mod_const_missing(VALUE klass, VALUE name)
|
|
{
|
|
rb_vm_pop_cfunc_frame();
|
|
uninitialized_constant(klass, rb_to_id(name));
|
|
|
|
UNREACHABLE;
|
|
}
|
|
|
|
static void
|
|
autoload_mark(void *ptr)
|
|
{
|
|
rb_mark_tbl((st_table *)ptr);
|
|
}
|
|
|
|
static void
|
|
autoload_free(void *ptr)
|
|
{
|
|
st_free_table((st_table *)ptr);
|
|
}
|
|
|
|
static size_t
|
|
autoload_memsize(const void *ptr)
|
|
{
|
|
const st_table *tbl = ptr;
|
|
return tbl ? st_memsize(tbl) : 0;
|
|
}
|
|
|
|
static const rb_data_type_t autoload_data_type = {
|
|
"autoload",
|
|
{autoload_mark, autoload_free, autoload_memsize,},
|
|
NULL, NULL, RUBY_TYPED_FREE_IMMEDIATELY
|
|
};
|
|
|
|
#define check_autoload_table(av) \
|
|
(struct st_table *)rb_check_typeddata((av), &autoload_data_type)
|
|
|
|
static VALUE
|
|
autoload_data(VALUE mod, ID id)
|
|
{
|
|
struct st_table *tbl;
|
|
st_data_t val;
|
|
|
|
if (!st_lookup(RCLASS_IV_TBL(mod), autoload, &val) ||
|
|
!(tbl = check_autoload_table((VALUE)val)) || !st_lookup(tbl, (st_data_t)id, &val)) {
|
|
return 0;
|
|
}
|
|
return (VALUE)val;
|
|
}
|
|
|
|
struct autoload_data_i {
|
|
VALUE feature;
|
|
int safe_level;
|
|
VALUE thread;
|
|
VALUE value;
|
|
};
|
|
|
|
static void
|
|
autoload_i_mark(void *ptr)
|
|
{
|
|
struct autoload_data_i *p = ptr;
|
|
rb_gc_mark(p->feature);
|
|
rb_gc_mark(p->thread);
|
|
rb_gc_mark(p->value);
|
|
}
|
|
|
|
static void
|
|
autoload_i_free(void *ptr)
|
|
{
|
|
struct autoload_data_i *p = ptr;
|
|
xfree(p);
|
|
}
|
|
|
|
static size_t
|
|
autoload_i_memsize(const void *ptr)
|
|
{
|
|
return sizeof(struct autoload_data_i);
|
|
}
|
|
|
|
static const rb_data_type_t autoload_data_i_type = {
|
|
"autoload_i",
|
|
{autoload_i_mark, autoload_i_free, autoload_i_memsize,},
|
|
NULL, NULL, RUBY_TYPED_FREE_IMMEDIATELY
|
|
};
|
|
|
|
#define check_autoload_data(av) \
|
|
(struct autoload_data_i *)rb_check_typeddata((av), &autoload_data_i_type)
|
|
|
|
void
|
|
rb_autoload(VALUE mod, ID id, const char *file)
|
|
{
|
|
st_data_t av;
|
|
VALUE ad, fn;
|
|
struct st_table *tbl;
|
|
struct autoload_data_i *ele;
|
|
|
|
if (!rb_is_const_id(id)) {
|
|
rb_raise(rb_eNameError, "autoload must be constant name: %"PRIsVALUE"",
|
|
QUOTE_ID(id));
|
|
}
|
|
if (!file || !*file) {
|
|
rb_raise(rb_eArgError, "empty file name");
|
|
}
|
|
|
|
if ((tbl = RCLASS_CONST_TBL(mod)) && st_lookup(tbl, (st_data_t)id, &av) && ((rb_const_entry_t*)av)->value != Qundef)
|
|
return;
|
|
|
|
rb_const_set(mod, id, Qundef);
|
|
tbl = RCLASS_IV_TBL(mod);
|
|
if (tbl && st_lookup(tbl, (st_data_t)autoload, &av)) {
|
|
tbl = check_autoload_table((VALUE)av);
|
|
}
|
|
else {
|
|
if (!tbl) tbl = RCLASS_IV_TBL(mod) = st_init_numtable();
|
|
av = (st_data_t)TypedData_Wrap_Struct(0, &autoload_data_type, 0);
|
|
st_add_direct(tbl, (st_data_t)autoload, av);
|
|
RB_OBJ_WRITTEN(mod, Qnil, av);
|
|
DATA_PTR(av) = tbl = st_init_numtable();
|
|
}
|
|
fn = rb_str_new2(file);
|
|
FL_UNSET(fn, FL_TAINT);
|
|
OBJ_FREEZE(fn);
|
|
|
|
ele = ALLOC(struct autoload_data_i);
|
|
ele->feature = fn;
|
|
ele->safe_level = rb_safe_level();
|
|
ele->thread = Qnil;
|
|
ele->value = Qundef;
|
|
ad = TypedData_Wrap_Struct(0, &autoload_data_i_type, ele);
|
|
st_insert(tbl, (st_data_t)id, (st_data_t)ad);
|
|
}
|
|
|
|
static void
|
|
autoload_delete(VALUE mod, ID id)
|
|
{
|
|
st_data_t val, load = 0, n = id;
|
|
rb_const_entry_t *ce;
|
|
|
|
st_delete(RCLASS_CONST_TBL(mod), &n, &val);
|
|
ce = (rb_const_entry_t*)val;
|
|
if (ce) xfree(ce);
|
|
if (st_lookup(RCLASS_IV_TBL(mod), (st_data_t)autoload, &val)) {
|
|
struct st_table *tbl = check_autoload_table((VALUE)val);
|
|
|
|
st_delete(tbl, &n, &load);
|
|
|
|
if (tbl->num_entries == 0) {
|
|
n = autoload;
|
|
st_delete(RCLASS_IV_TBL(mod), &n, &val);
|
|
}
|
|
}
|
|
}
|
|
|
|
static VALUE
|
|
autoload_provided(VALUE arg)
|
|
{
|
|
const char **p = (const char **)arg;
|
|
return rb_feature_provided(*p, p);
|
|
}
|
|
|
|
static VALUE
|
|
reset_safe(VALUE safe)
|
|
{
|
|
rb_set_safe_level_force((int)safe);
|
|
return safe;
|
|
}
|
|
|
|
static VALUE
|
|
check_autoload_required(VALUE mod, ID id, const char **loadingpath)
|
|
{
|
|
VALUE file, load;
|
|
struct autoload_data_i *ele;
|
|
const char *loading;
|
|
int safe;
|
|
|
|
if (!(load = autoload_data(mod, id)) || !(ele = check_autoload_data(load))) {
|
|
return 0;
|
|
}
|
|
file = ele->feature;
|
|
Check_Type(file, T_STRING);
|
|
if (!RSTRING_PTR(file) || !*RSTRING_PTR(file)) {
|
|
rb_raise(rb_eArgError, "empty file name");
|
|
}
|
|
loading = RSTRING_PTR(file);
|
|
safe = rb_safe_level();
|
|
rb_set_safe_level_force(0);
|
|
if (!rb_ensure(autoload_provided, (VALUE)&loading, reset_safe, (VALUE)safe)) {
|
|
return load;
|
|
}
|
|
if (loadingpath && loading) {
|
|
*loadingpath = loading;
|
|
return load;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
rb_autoloading_value(VALUE mod, ID id, VALUE* value)
|
|
{
|
|
VALUE load;
|
|
struct autoload_data_i *ele;
|
|
|
|
if (!(load = autoload_data(mod, id)) || !(ele = check_autoload_data(load))) {
|
|
return 0;
|
|
}
|
|
if (ele->thread == rb_thread_current()) {
|
|
if (ele->value != Qundef) {
|
|
if (value) {
|
|
*value = ele->value;
|
|
}
|
|
return 1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
autoload_defined_p(VALUE mod, ID id)
|
|
{
|
|
struct st_table *tbl = RCLASS_CONST_TBL(mod);
|
|
st_data_t val;
|
|
|
|
if (!tbl || !st_lookup(tbl, (st_data_t)id, &val) || ((rb_const_entry_t*)val)->value != Qundef) {
|
|
return 0;
|
|
}
|
|
return !rb_autoloading_value(mod, id, NULL);
|
|
}
|
|
|
|
struct autoload_const_set_args {
|
|
VALUE mod;
|
|
ID id;
|
|
VALUE value;
|
|
};
|
|
|
|
static VALUE
|
|
autoload_const_set(VALUE arg)
|
|
{
|
|
struct autoload_const_set_args* args = (struct autoload_const_set_args *)arg;
|
|
autoload_delete(args->mod, args->id);
|
|
rb_const_set(args->mod, args->id, args->value);
|
|
return 0; /* ignored */
|
|
}
|
|
|
|
static VALUE
|
|
autoload_require(VALUE arg)
|
|
{
|
|
struct autoload_data_i *ele = (struct autoload_data_i *)arg;
|
|
return rb_require_safe(ele->feature, ele->safe_level);
|
|
}
|
|
|
|
VALUE
|
|
rb_autoload_load(VALUE mod, ID id)
|
|
{
|
|
VALUE load, result;
|
|
const char *loading = 0, *src;
|
|
struct autoload_data_i *ele;
|
|
int state = 0;
|
|
|
|
if (!autoload_defined_p(mod, id)) return Qfalse;
|
|
load = check_autoload_required(mod, id, &loading);
|
|
if (!load) return Qfalse;
|
|
src = rb_sourcefile();
|
|
if (src && loading && strcmp(src, loading) == 0) return Qfalse;
|
|
|
|
/* set ele->thread for a marker of autoloading thread */
|
|
if (!(ele = check_autoload_data(load))) {
|
|
return Qfalse;
|
|
}
|
|
if (ele->thread == Qnil) {
|
|
ele->thread = rb_thread_current();
|
|
}
|
|
/* autoload_data_i can be deleted by another thread while require */
|
|
result = rb_protect(autoload_require, (VALUE)ele, &state);
|
|
if (ele->thread == rb_thread_current()) {
|
|
ele->thread = Qnil;
|
|
}
|
|
if (state) rb_jump_tag(state);
|
|
|
|
if (RTEST(result)) {
|
|
/* At the last, move a value defined in autoload to constant table */
|
|
if (ele->value != Qundef) {
|
|
int safe_backup;
|
|
struct autoload_const_set_args args;
|
|
args.mod = mod;
|
|
args.id = id;
|
|
args.value = ele->value;
|
|
safe_backup = rb_safe_level();
|
|
rb_set_safe_level_force(ele->safe_level);
|
|
rb_ensure(autoload_const_set, (VALUE)&args, reset_safe, (VALUE)safe_backup);
|
|
}
|
|
}
|
|
RB_GC_GUARD(load);
|
|
return result;
|
|
}
|
|
|
|
VALUE
|
|
rb_autoload_p(VALUE mod, ID id)
|
|
{
|
|
VALUE load;
|
|
struct autoload_data_i *ele;
|
|
|
|
while (!autoload_defined_p(mod, id)) {
|
|
mod = RCLASS_SUPER(mod);
|
|
if (!mod) return Qnil;
|
|
}
|
|
load = check_autoload_required(mod, id, 0);
|
|
if (!load) return Qnil;
|
|
return (ele = check_autoload_data(load)) ? ele->feature : Qnil;
|
|
}
|
|
|
|
static VALUE
|
|
rb_const_get_0(VALUE klass, ID id, int exclude, int recurse, int visibility)
|
|
{
|
|
VALUE value, tmp, av;
|
|
int mod_retry = 0;
|
|
|
|
tmp = klass;
|
|
retry:
|
|
while (RTEST(tmp)) {
|
|
VALUE am = 0;
|
|
st_data_t data;
|
|
while (RCLASS_CONST_TBL(tmp) && st_lookup(RCLASS_CONST_TBL(tmp), (st_data_t)id, &data)) {
|
|
rb_const_entry_t *ce = (rb_const_entry_t *)data;
|
|
if (visibility && ce->flag == CONST_PRIVATE) {
|
|
rb_name_error(id, "private constant %"PRIsVALUE"::%"PRIsVALUE" referenced",
|
|
rb_class_name(klass), QUOTE_ID(id));
|
|
}
|
|
value = ce->value;
|
|
if (value == Qundef) {
|
|
if (am == tmp) break;
|
|
am = tmp;
|
|
if (rb_autoloading_value(tmp, id, &av)) return av;
|
|
rb_autoload_load(tmp, id);
|
|
continue;
|
|
}
|
|
if (exclude && tmp == rb_cObject && klass != rb_cObject) {
|
|
rb_warn("toplevel constant %"PRIsVALUE" referenced by %"PRIsVALUE"::%"PRIsVALUE"",
|
|
QUOTE_ID(id), rb_class_name(klass), QUOTE_ID(id));
|
|
}
|
|
return value;
|
|
}
|
|
if (!recurse) break;
|
|
tmp = RCLASS_SUPER(tmp);
|
|
}
|
|
if (!exclude && !mod_retry && BUILTIN_TYPE(klass) == T_MODULE) {
|
|
mod_retry = 1;
|
|
tmp = rb_cObject;
|
|
goto retry;
|
|
}
|
|
|
|
value = const_missing(klass, id);
|
|
rb_vm_inc_const_missing_count();
|
|
return value;
|
|
}
|
|
|
|
VALUE
|
|
rb_const_get_from(VALUE klass, ID id)
|
|
{
|
|
return rb_const_get_0(klass, id, TRUE, TRUE, FALSE);
|
|
}
|
|
|
|
VALUE
|
|
rb_const_get(VALUE klass, ID id)
|
|
{
|
|
return rb_const_get_0(klass, id, FALSE, TRUE, FALSE);
|
|
}
|
|
|
|
VALUE
|
|
rb_const_get_at(VALUE klass, ID id)
|
|
{
|
|
return rb_const_get_0(klass, id, TRUE, FALSE, FALSE);
|
|
}
|
|
|
|
VALUE
|
|
rb_public_const_get_from(VALUE klass, ID id)
|
|
{
|
|
return rb_const_get_0(klass, id, TRUE, TRUE, TRUE);
|
|
}
|
|
|
|
VALUE
|
|
rb_public_const_get(VALUE klass, ID id)
|
|
{
|
|
return rb_const_get_0(klass, id, FALSE, TRUE, TRUE);
|
|
}
|
|
|
|
VALUE
|
|
rb_public_const_get_at(VALUE klass, ID id)
|
|
{
|
|
return rb_const_get_0(klass, id, TRUE, FALSE, TRUE);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* remove_const(sym) -> obj
|
|
*
|
|
* Removes the definition of the given constant, returning that
|
|
* constant's previous value. If that constant referred to
|
|
* a module, this will not change that module's name and can lead
|
|
* to confusion.
|
|
*/
|
|
|
|
VALUE
|
|
rb_mod_remove_const(VALUE mod, VALUE name)
|
|
{
|
|
const ID id = rb_check_id_without_pindown(&name);
|
|
|
|
if (!id) {
|
|
if (rb_is_const_name(name)) {
|
|
rb_name_error_str(name, "constant %"PRIsVALUE"::%"PRIsVALUE" not defined",
|
|
rb_class_name(mod), name);
|
|
}
|
|
else {
|
|
rb_name_error_str(name, "`%"PRIsVALUE"' is not allowed as a constant name",
|
|
QUOTE(name));
|
|
}
|
|
}
|
|
if (!rb_is_const_id(id)) {
|
|
rb_name_error(id, "`%"PRIsVALUE"' is not allowed as a constant name",
|
|
QUOTE_ID(id));
|
|
}
|
|
return rb_const_remove(mod, id);
|
|
}
|
|
|
|
VALUE
|
|
rb_const_remove(VALUE mod, ID id)
|
|
{
|
|
VALUE val;
|
|
st_data_t v, n = id;
|
|
|
|
rb_check_frozen(mod);
|
|
if (!RCLASS_CONST_TBL(mod) || !st_delete(RCLASS_CONST_TBL(mod), &n, &v)) {
|
|
if (rb_const_defined_at(mod, id)) {
|
|
rb_name_error(id, "cannot remove %"PRIsVALUE"::%"PRIsVALUE"",
|
|
rb_class_name(mod), QUOTE_ID(id));
|
|
}
|
|
rb_name_error(id, "constant %"PRIsVALUE"::%"PRIsVALUE" not defined",
|
|
rb_class_name(mod), QUOTE_ID(id));
|
|
}
|
|
|
|
rb_clear_constant_cache();
|
|
|
|
val = ((rb_const_entry_t*)v)->value;
|
|
if (val == Qundef) {
|
|
autoload_delete(mod, id);
|
|
val = Qnil;
|
|
}
|
|
xfree((rb_const_entry_t*)v);
|
|
return val;
|
|
}
|
|
|
|
static int
|
|
sv_i(st_data_t k, st_data_t v, st_data_t a)
|
|
{
|
|
ID key = (ID)k;
|
|
rb_const_entry_t *ce = (rb_const_entry_t *)v;
|
|
st_table *tbl = (st_table *)a;
|
|
|
|
if (rb_is_const_id(key)) {
|
|
if (!st_lookup(tbl, (st_data_t)key, 0)) {
|
|
st_insert(tbl, (st_data_t)key, (st_data_t)ce);
|
|
}
|
|
}
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
static int
|
|
rb_local_constants_i(st_data_t const_name, st_data_t const_value, st_data_t ary)
|
|
{
|
|
rb_ary_push((VALUE)ary, ID2SYM((ID)const_name));
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
static VALUE
|
|
rb_local_constants(VALUE mod)
|
|
{
|
|
st_table *tbl = RCLASS_CONST_TBL(mod);
|
|
VALUE ary;
|
|
|
|
if (!tbl) return rb_ary_new2(0);
|
|
|
|
ary = rb_ary_new2(tbl->num_entries);
|
|
st_foreach(tbl, rb_local_constants_i, ary);
|
|
return ary;
|
|
}
|
|
|
|
void*
|
|
rb_mod_const_at(VALUE mod, void *data)
|
|
{
|
|
st_table *tbl = data;
|
|
if (!tbl) {
|
|
tbl = st_init_numtable();
|
|
}
|
|
if (RCLASS_CONST_TBL(mod)) {
|
|
st_foreach_safe(RCLASS_CONST_TBL(mod), sv_i, (st_data_t)tbl);
|
|
}
|
|
return tbl;
|
|
}
|
|
|
|
void*
|
|
rb_mod_const_of(VALUE mod, void *data)
|
|
{
|
|
VALUE tmp = mod;
|
|
for (;;) {
|
|
data = rb_mod_const_at(tmp, data);
|
|
tmp = RCLASS_SUPER(tmp);
|
|
if (!tmp) break;
|
|
if (tmp == rb_cObject && mod != rb_cObject) break;
|
|
}
|
|
return data;
|
|
}
|
|
|
|
static int
|
|
list_i(st_data_t key, st_data_t value, VALUE ary)
|
|
{
|
|
ID sym = (ID)key;
|
|
rb_const_entry_t *ce = (rb_const_entry_t *)value;
|
|
if (ce->flag != CONST_PRIVATE) rb_ary_push(ary, ID2SYM(sym));
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
VALUE
|
|
rb_const_list(void *data)
|
|
{
|
|
st_table *tbl = data;
|
|
VALUE ary;
|
|
|
|
if (!tbl) return rb_ary_new2(0);
|
|
ary = rb_ary_new2(tbl->num_entries);
|
|
st_foreach_safe(tbl, list_i, ary);
|
|
st_free_table(tbl);
|
|
|
|
return ary;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* mod.constants(inherit=true) -> array
|
|
*
|
|
* Returns an array of the names of the constants accessible in
|
|
* <i>mod</i>. This includes the names of constants in any included
|
|
* modules (example at start of section), unless the <i>inherit</i>
|
|
* parameter is set to <code>false</code>.
|
|
*
|
|
* IO.constants.include?(:SYNC) #=> true
|
|
* IO.constants(false).include?(:SYNC) #=> false
|
|
*
|
|
* Also see <code>Module::const_defined?</code>.
|
|
*/
|
|
|
|
VALUE
|
|
rb_mod_constants(int argc, const VALUE *argv, VALUE mod)
|
|
{
|
|
VALUE inherit;
|
|
|
|
if (argc == 0) {
|
|
inherit = Qtrue;
|
|
}
|
|
else {
|
|
rb_scan_args(argc, argv, "01", &inherit);
|
|
}
|
|
|
|
if (RTEST(inherit)) {
|
|
return rb_const_list(rb_mod_const_of(mod, 0));
|
|
}
|
|
else {
|
|
return rb_local_constants(mod);
|
|
}
|
|
}
|
|
|
|
static int
|
|
rb_const_defined_0(VALUE klass, ID id, int exclude, int recurse, int visibility)
|
|
{
|
|
st_data_t value;
|
|
VALUE tmp;
|
|
int mod_retry = 0;
|
|
|
|
tmp = klass;
|
|
retry:
|
|
while (tmp) {
|
|
if (RCLASS_CONST_TBL(tmp) && st_lookup(RCLASS_CONST_TBL(tmp), (st_data_t)id, &value)) {
|
|
rb_const_entry_t *ce = (rb_const_entry_t *)value;
|
|
if (visibility && ce->flag == CONST_PRIVATE) {
|
|
return (int)Qfalse;
|
|
}
|
|
if (ce->value == Qundef && !check_autoload_required(tmp, id, 0) && !rb_autoloading_value(tmp, id, 0))
|
|
return (int)Qfalse;
|
|
return (int)Qtrue;
|
|
}
|
|
if (!recurse) break;
|
|
tmp = RCLASS_SUPER(tmp);
|
|
}
|
|
if (!exclude && !mod_retry && BUILTIN_TYPE(klass) == T_MODULE) {
|
|
mod_retry = 1;
|
|
tmp = rb_cObject;
|
|
goto retry;
|
|
}
|
|
return (int)Qfalse;
|
|
}
|
|
|
|
int
|
|
rb_const_defined_from(VALUE klass, ID id)
|
|
{
|
|
return rb_const_defined_0(klass, id, TRUE, TRUE, FALSE);
|
|
}
|
|
|
|
int
|
|
rb_const_defined(VALUE klass, ID id)
|
|
{
|
|
return rb_const_defined_0(klass, id, FALSE, TRUE, FALSE);
|
|
}
|
|
|
|
int
|
|
rb_const_defined_at(VALUE klass, ID id)
|
|
{
|
|
return rb_const_defined_0(klass, id, TRUE, FALSE, FALSE);
|
|
}
|
|
|
|
int
|
|
rb_public_const_defined_from(VALUE klass, ID id)
|
|
{
|
|
return rb_const_defined_0(klass, id, TRUE, TRUE, TRUE);
|
|
}
|
|
|
|
int
|
|
rb_public_const_defined(VALUE klass, ID id)
|
|
{
|
|
return rb_const_defined_0(klass, id, FALSE, TRUE, TRUE);
|
|
}
|
|
|
|
int
|
|
rb_public_const_defined_at(VALUE klass, ID id)
|
|
{
|
|
return rb_const_defined_0(klass, id, TRUE, FALSE, TRUE);
|
|
}
|
|
|
|
static void
|
|
check_before_mod_set(VALUE klass, ID id, VALUE val, const char *dest)
|
|
{
|
|
rb_check_frozen(klass);
|
|
}
|
|
|
|
void
|
|
rb_const_set(VALUE klass, ID id, VALUE val)
|
|
{
|
|
rb_const_entry_t *ce;
|
|
rb_const_flag_t visibility = CONST_PUBLIC;
|
|
|
|
if (NIL_P(klass)) {
|
|
rb_raise(rb_eTypeError, "no class/module to define constant %"PRIsVALUE"",
|
|
QUOTE_ID(id));
|
|
}
|
|
|
|
check_before_mod_set(klass, id, val, "constant");
|
|
if (!RCLASS_CONST_TBL(klass)) {
|
|
RCLASS_CONST_TBL(klass) = st_init_numtable();
|
|
}
|
|
else {
|
|
st_data_t value;
|
|
|
|
if (st_lookup(RCLASS_CONST_TBL(klass), (st_data_t)id, &value)) {
|
|
rb_const_entry_t *ce = (rb_const_entry_t*)value;
|
|
if (ce->value == Qundef) {
|
|
VALUE load;
|
|
struct autoload_data_i *ele;
|
|
|
|
load = autoload_data(klass, id);
|
|
/* for autoloading thread, keep the defined value to autoloading storage */
|
|
if (load && (ele = check_autoload_data(load)) && (ele->thread == rb_thread_current())) {
|
|
rb_clear_constant_cache();
|
|
|
|
ele->value = val; /* autoload_i is non-WB-protected */
|
|
return;
|
|
}
|
|
/* otherwise, allow to override */
|
|
autoload_delete(klass, id);
|
|
}
|
|
else {
|
|
VALUE name = QUOTE_ID(id);
|
|
visibility = ce->flag;
|
|
if (klass == rb_cObject)
|
|
rb_warn("already initialized constant %"PRIsVALUE"", name);
|
|
else
|
|
rb_warn("already initialized constant %"PRIsVALUE"::%"PRIsVALUE"",
|
|
rb_class_name(klass), name);
|
|
if (!NIL_P(ce->file) && ce->line) {
|
|
rb_compile_warn(RSTRING_PTR(ce->file), ce->line,
|
|
"previous definition of %"PRIsVALUE" was here", name);
|
|
}
|
|
st_delete(RCLASS_CONST_TBL(klass), &id, 0);
|
|
xfree(ce);
|
|
}
|
|
}
|
|
}
|
|
|
|
rb_clear_constant_cache();
|
|
|
|
|
|
ce = ALLOC(rb_const_entry_t);
|
|
MEMZERO(ce, rb_const_entry_t, 1);
|
|
ce->flag = visibility;
|
|
ce->line = rb_sourceline();
|
|
st_insert(RCLASS_CONST_TBL(klass), (st_data_t)id, (st_data_t)ce);
|
|
RB_OBJ_WRITE(klass, &ce->value, val);
|
|
RB_OBJ_WRITE(klass, &ce->file, rb_sourcefilename());
|
|
}
|
|
|
|
void
|
|
rb_define_const(VALUE klass, const char *name, VALUE val)
|
|
{
|
|
ID id = rb_intern(name);
|
|
|
|
if (!rb_is_const_id(id)) {
|
|
rb_warn("rb_define_const: invalid name `%s' for constant", name);
|
|
}
|
|
rb_const_set(klass, id, val);
|
|
}
|
|
|
|
void
|
|
rb_define_global_const(const char *name, VALUE val)
|
|
{
|
|
rb_define_const(rb_cObject, name, val);
|
|
}
|
|
|
|
static void
|
|
set_const_visibility(VALUE mod, int argc, const VALUE *argv, rb_const_flag_t flag)
|
|
{
|
|
int i;
|
|
st_data_t v;
|
|
ID id;
|
|
|
|
if (argc == 0) {
|
|
rb_warning("%"PRIsVALUE" with no argument is just ignored",
|
|
QUOTE_ID(rb_frame_callee()));
|
|
return;
|
|
}
|
|
|
|
for (i = 0; i < argc; i++) {
|
|
VALUE val = argv[i];
|
|
id = rb_check_id(&val);
|
|
if (!id) {
|
|
if (i > 0) {
|
|
rb_clear_constant_cache();
|
|
}
|
|
|
|
rb_name_error_str(val, "constant %"PRIsVALUE"::%"PRIsVALUE" not defined",
|
|
rb_class_name(mod), QUOTE(val));
|
|
}
|
|
if (RCLASS_CONST_TBL(mod) &&
|
|
st_lookup(RCLASS_CONST_TBL(mod), (st_data_t)id, &v)) {
|
|
((rb_const_entry_t*)v)->flag = flag;
|
|
}
|
|
else {
|
|
if (i > 0) {
|
|
rb_clear_constant_cache();
|
|
}
|
|
rb_name_error(id, "constant %"PRIsVALUE"::%"PRIsVALUE" not defined",
|
|
rb_class_name(mod), QUOTE_ID(id));
|
|
}
|
|
}
|
|
rb_clear_constant_cache();
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* mod.private_constant(symbol, ...) => mod
|
|
*
|
|
* Makes a list of existing constants private.
|
|
*/
|
|
|
|
VALUE
|
|
rb_mod_private_constant(int argc, const VALUE *argv, VALUE obj)
|
|
{
|
|
set_const_visibility(obj, argc, argv, CONST_PRIVATE);
|
|
return obj;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* mod.public_constant(symbol, ...) => mod
|
|
*
|
|
* Makes a list of existing constants public.
|
|
*/
|
|
|
|
VALUE
|
|
rb_mod_public_constant(int argc, const VALUE *argv, VALUE obj)
|
|
{
|
|
set_const_visibility(obj, argc, argv, CONST_PUBLIC);
|
|
return obj;
|
|
}
|
|
|
|
static VALUE
|
|
original_module(VALUE c)
|
|
{
|
|
if (RB_TYPE_P(c, T_ICLASS))
|
|
return RBASIC(c)->klass;
|
|
return c;
|
|
}
|
|
|
|
static int
|
|
cvar_lookup_at(VALUE klass, ID id, st_data_t *v)
|
|
{
|
|
if (!RCLASS_IV_TBL(klass)) return 0;
|
|
return st_lookup(RCLASS_IV_TBL(klass), (st_data_t)id, v);
|
|
}
|
|
|
|
static VALUE
|
|
cvar_front_klass(VALUE klass)
|
|
{
|
|
if (FL_TEST(klass, FL_SINGLETON)) {
|
|
VALUE obj = rb_ivar_get(klass, id__attached__);
|
|
if (RB_TYPE_P(obj, T_MODULE) || RB_TYPE_P(obj, T_CLASS)) {
|
|
return obj;
|
|
}
|
|
}
|
|
return RCLASS_SUPER(klass);
|
|
}
|
|
|
|
#define CVAR_FOREACH_ANCESTORS(klass, v, r) \
|
|
for (klass = cvar_front_klass(klass); klass; klass = RCLASS_SUPER(klass)) { \
|
|
if (cvar_lookup_at(klass, id, (v))) { \
|
|
r; \
|
|
} \
|
|
}
|
|
|
|
#define CVAR_LOOKUP(v,r) do {\
|
|
if (cvar_lookup_at(klass, id, (v))) {r;}\
|
|
CVAR_FOREACH_ANCESTORS(klass, v, r);\
|
|
} while(0)
|
|
|
|
void
|
|
rb_cvar_set(VALUE klass, ID id, VALUE val)
|
|
{
|
|
VALUE tmp, front = 0, target = 0;
|
|
|
|
tmp = klass;
|
|
CVAR_LOOKUP(0, {if (!front) front = klass; target = klass;});
|
|
if (target) {
|
|
if (front && target != front) {
|
|
st_data_t did = id;
|
|
|
|
if (RTEST(ruby_verbose)) {
|
|
rb_warning("class variable %"PRIsVALUE" of %"PRIsVALUE" is overtaken by %"PRIsVALUE"",
|
|
QUOTE_ID(id), rb_class_name(original_module(front)),
|
|
rb_class_name(original_module(target)));
|
|
}
|
|
if (BUILTIN_TYPE(front) == T_CLASS) {
|
|
st_delete(RCLASS_IV_TBL(front),&did,0);
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
target = tmp;
|
|
}
|
|
|
|
check_before_mod_set(target, id, val, "class variable");
|
|
if (!RCLASS_IV_TBL(target)) {
|
|
RCLASS_IV_TBL(target) = st_init_numtable();
|
|
}
|
|
|
|
rb_st_insert_id_and_value(target, RCLASS_IV_TBL(target), (st_data_t)id, (st_data_t)val);
|
|
}
|
|
|
|
VALUE
|
|
rb_cvar_get(VALUE klass, ID id)
|
|
{
|
|
VALUE tmp, front = 0, target = 0;
|
|
st_data_t value;
|
|
|
|
tmp = klass;
|
|
CVAR_LOOKUP(&value, {if (!front) front = klass; target = klass;});
|
|
if (!target) {
|
|
rb_name_error(id, "uninitialized class variable %"PRIsVALUE" in %"PRIsVALUE"",
|
|
QUOTE_ID(id), rb_class_name(tmp));
|
|
}
|
|
if (front && target != front) {
|
|
st_data_t did = id;
|
|
|
|
if (RTEST(ruby_verbose)) {
|
|
rb_warning("class variable %"PRIsVALUE" of %"PRIsVALUE" is overtaken by %"PRIsVALUE"",
|
|
QUOTE_ID(id), rb_class_name(original_module(front)),
|
|
rb_class_name(original_module(target)));
|
|
}
|
|
if (BUILTIN_TYPE(front) == T_CLASS) {
|
|
st_delete(RCLASS_IV_TBL(front),&did,0);
|
|
}
|
|
}
|
|
return (VALUE)value;
|
|
}
|
|
|
|
VALUE
|
|
rb_cvar_defined(VALUE klass, ID id)
|
|
{
|
|
if (!klass) return Qfalse;
|
|
CVAR_LOOKUP(0,return Qtrue);
|
|
return Qfalse;
|
|
}
|
|
|
|
void
|
|
rb_cv_set(VALUE klass, const char *name, VALUE val)
|
|
{
|
|
ID id = rb_intern(name);
|
|
if (!rb_is_class_id(id)) {
|
|
rb_name_error(id, "wrong class variable name %s", name);
|
|
}
|
|
rb_cvar_set(klass, id, val);
|
|
}
|
|
|
|
VALUE
|
|
rb_cv_get(VALUE klass, const char *name)
|
|
{
|
|
ID id = rb_intern(name);
|
|
if (!rb_is_class_id(id)) {
|
|
rb_name_error(id, "wrong class variable name %s", name);
|
|
}
|
|
return rb_cvar_get(klass, id);
|
|
}
|
|
|
|
void
|
|
rb_define_class_variable(VALUE klass, const char *name, VALUE val)
|
|
{
|
|
ID id = rb_intern(name);
|
|
|
|
if (!rb_is_class_id(id)) {
|
|
rb_name_error(id, "wrong class variable name %s", name);
|
|
}
|
|
rb_cvar_set(klass, id, val);
|
|
}
|
|
|
|
static int
|
|
cv_i(st_data_t k, st_data_t v, st_data_t a)
|
|
{
|
|
ID key = (ID)k;
|
|
st_table *tbl = (st_table *)a;
|
|
|
|
if (rb_is_class_id(key)) {
|
|
if (!st_lookup(tbl, (st_data_t)key, 0)) {
|
|
st_insert(tbl, (st_data_t)key, 0);
|
|
}
|
|
}
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
static void*
|
|
mod_cvar_at(VALUE mod, void *data)
|
|
{
|
|
st_table *tbl = data;
|
|
if (!tbl) {
|
|
tbl = st_init_numtable();
|
|
}
|
|
if (RCLASS_IV_TBL(mod)) {
|
|
st_foreach_safe(RCLASS_IV_TBL(mod), cv_i, (st_data_t)tbl);
|
|
}
|
|
return tbl;
|
|
}
|
|
|
|
static void*
|
|
mod_cvar_of(VALUE mod, void *data)
|
|
{
|
|
VALUE tmp = mod;
|
|
for (;;) {
|
|
data = mod_cvar_at(tmp, data);
|
|
tmp = RCLASS_SUPER(tmp);
|
|
if (!tmp) break;
|
|
}
|
|
return data;
|
|
}
|
|
|
|
static int
|
|
cv_list_i(st_data_t key, st_data_t value, VALUE ary)
|
|
{
|
|
ID sym = (ID)key;
|
|
rb_ary_push(ary, ID2SYM(sym));
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
static VALUE
|
|
cvar_list(void *data)
|
|
{
|
|
st_table *tbl = data;
|
|
VALUE ary;
|
|
|
|
if (!tbl) return rb_ary_new2(0);
|
|
ary = rb_ary_new2(tbl->num_entries);
|
|
st_foreach_safe(tbl, cv_list_i, ary);
|
|
st_free_table(tbl);
|
|
|
|
return ary;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* mod.class_variables(inherit=true) -> array
|
|
*
|
|
* Returns an array of the names of class variables in <i>mod</i>.
|
|
* This includes the names of class variables in any included
|
|
* modules, unless the <i>inherit</i> parameter is set to
|
|
* <code>false</code>.
|
|
*
|
|
* class One
|
|
* @@var1 = 1
|
|
* end
|
|
* class Two < One
|
|
* @@var2 = 2
|
|
* end
|
|
* One.class_variables #=> [:@@var1]
|
|
* Two.class_variables #=> [:@@var2, :@@var1]
|
|
* Two.class_variables(false) #=> [:@@var2]
|
|
*/
|
|
|
|
VALUE
|
|
rb_mod_class_variables(int argc, const VALUE *argv, VALUE mod)
|
|
{
|
|
VALUE inherit;
|
|
st_table *tbl;
|
|
|
|
if (argc == 0) {
|
|
inherit = Qtrue;
|
|
}
|
|
else {
|
|
rb_scan_args(argc, argv, "01", &inherit);
|
|
}
|
|
if (RTEST(inherit)) {
|
|
tbl = mod_cvar_of(mod, 0);
|
|
}
|
|
else {
|
|
tbl = mod_cvar_at(mod, 0);
|
|
}
|
|
return cvar_list(tbl);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* remove_class_variable(sym) -> obj
|
|
*
|
|
* Removes the definition of the <i>sym</i>, returning that
|
|
* constant's value.
|
|
*
|
|
* class Dummy
|
|
* @@var = 99
|
|
* puts @@var
|
|
* remove_class_variable(:@@var)
|
|
* p(defined? @@var)
|
|
* end
|
|
*
|
|
* <em>produces:</em>
|
|
*
|
|
* 99
|
|
* nil
|
|
*/
|
|
|
|
VALUE
|
|
rb_mod_remove_cvar(VALUE mod, VALUE name)
|
|
{
|
|
const ID id = rb_check_id_without_pindown(&name);
|
|
st_data_t val, n = id;
|
|
|
|
if (!id) {
|
|
if (rb_is_class_name(name)) {
|
|
rb_name_error_str(name, "class variable %"PRIsVALUE" not defined for %"PRIsVALUE"",
|
|
name, rb_class_name(mod));
|
|
}
|
|
else {
|
|
rb_name_error_str(name, "wrong class variable name %"PRIsVALUE"", QUOTE(name));
|
|
}
|
|
}
|
|
if (!rb_is_class_id(id)) {
|
|
rb_name_error(id, "wrong class variable name %"PRIsVALUE"", QUOTE_ID(id));
|
|
}
|
|
rb_check_frozen(mod);
|
|
if (RCLASS_IV_TBL(mod) && st_delete(RCLASS_IV_TBL(mod), &n, &val)) {
|
|
return (VALUE)val;
|
|
}
|
|
if (rb_cvar_defined(mod, id)) {
|
|
rb_name_error(id, "cannot remove %"PRIsVALUE" for %"PRIsVALUE"",
|
|
QUOTE_ID(id), rb_class_name(mod));
|
|
}
|
|
rb_name_error(id, "class variable %"PRIsVALUE" not defined for %"PRIsVALUE"",
|
|
QUOTE_ID(id), rb_class_name(mod));
|
|
|
|
UNREACHABLE;
|
|
}
|
|
|
|
VALUE
|
|
rb_iv_get(VALUE obj, const char *name)
|
|
{
|
|
ID id = rb_intern(name);
|
|
|
|
return rb_ivar_get(obj, id);
|
|
}
|
|
|
|
VALUE
|
|
rb_iv_set(VALUE obj, const char *name, VALUE val)
|
|
{
|
|
ID id = rb_intern(name);
|
|
|
|
return rb_ivar_set(obj, id, val);
|
|
}
|
|
|
|
/* tbl = xx(obj); tbl[key] = value; */
|
|
int
|
|
rb_st_insert_id_and_value(VALUE obj, st_table *tbl, ID key, VALUE value)
|
|
{
|
|
int result = st_insert(tbl, (st_data_t)key, (st_data_t)value);
|
|
RB_OBJ_WRITTEN(obj, Qundef, value);
|
|
return result;
|
|
}
|
|
|
|
static int
|
|
tbl_copy_i(st_data_t key, st_data_t value, st_data_t data)
|
|
{
|
|
RB_OBJ_WRITTEN((VALUE)data, Qundef, (VALUE)value);
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
st_table *
|
|
rb_st_copy(VALUE obj, struct st_table *orig_tbl)
|
|
{
|
|
st_table *new_tbl = st_copy(orig_tbl);
|
|
st_foreach(new_tbl, tbl_copy_i, (st_data_t)obj);
|
|
return new_tbl;
|
|
}
|